Gregory Choong

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Silicon heterojunction technology (Si-HJT) consists of thin amorphous silicon layers on monocrystalline silicon wafers and allows for photovoltaic solar cells with energy-conversion efficiencies above 20 %, also at industrial-production level. This article reports how this may be achieved. First, we focus on the surface-passivation mechanism of intrinsic(More)
Vertical integration of amorphous hydrogenated silicon diodes on CMOS readout chips offers several advantages compared to standard CMOS imagers in terms of sensitivity, dynamic range and dark current while at the same time introducing some undesired transient effects leading to image lag. Performance of such sensors is here reported and their transient(More)
1. Introduction Semiconducting heterostructures increasingly attract attention for electronic junction formation in crystalline silicon (c-Si) wafer-based solar cells. A key point of such a device is the displacement of highly recombination-active (ohmic) contacts from the crystalline surface by insertion of a film with wide bandgap. To reach the full(More)
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